Pediobius polychrosis Sheng & Wang, 1994

Cao, Huan-Xi, Salle, John La & Zhu, Chao-Dong, 2017, Chinese species of Pediobius Walker (Hymenoptera: Eulophidae), Zootaxa 4240 (1), pp. 1-71 : 61-62

33. Pediobius polychrosis Sheng & Wang, 1994

( Fig. 30 )

Pediobius polychrosis Sheng & Wang, 1994: 103 ; ♀. Holotype ♀, IZCAS, examined.

Diagnosis. Legs except tarsi dark brown with slight dark green reflections. Collar of pronotum not margined anteriorly, but distinctly delimited from reticulate neck. In both female and male, gaster truncate ovate, with following gastral tergites usually concealed by large Gt1; Gt1 with longitudinal meshes medially ( Figs 30 a–c).

Material examined. Holotype ♀, CHINA, Jiangxi, An-Fu, 2.X.1984, coll. Shui-Sheng Chen ( IZCAS), ex. Polychrosis cunninghamiacola Liu & Pai . Paratypes 4♀, same data as the holotype . Other materials: CHINA, Jiangsu: 2♀ 1♂, Nanjing, Nanjing Forest Institute , VI.1982, coll. Qu-Xian Peng, ex. Polychrosis cunninghamiacola Liu & Pai ; 1♀1♂, Xuzhou, 1978, ex. the pupae of Polychrosis cunninghamiacola Liu & Pai.

Biology. In China, the type specimens and the other examined specimens of P. polychrosis were all reared from Polychrosis cunninghamiacola ( Lepidoptera : Tortricidae ).

Distribution in China. Jiangxi, Jiangsu.

Remarks. Pediobius polychrosis is similar to P. mitsukurii in stout body, reticulate mesoscutum and scutellum, truncated gaster, and large Gt1 with distinct longitudinal meshes. With careful observations, many differences will be found between them: in P. polychrosis , flagellum, femora and tibiae dark brown with dark green reflections, occiput sharply margined between eyes, lateral corners of pronotum not prominent, and two lateral foveae on dorsellum strongly reduced ( Figs 30 a–c); while for P. mitsukurii , flagellum, femora and tibiae pale, occiput more blunt and only margined behind each posterior ocellus (but male has occiput distinctly margined), lateral corners of pronotum strongly prominent, and two lateral foveae on dorsellum strikingly large (but reduced in male) ( Figs 29 a– c). Compared with P. mitsukurii , P. polychrosis is closer to P. facialis because they share similar short female antennae and reticulate sculpture on mesoscutum and scutellum, which their males appear more similar than females ( Figs 12 c, 30c). Pediobius polychrosis is easily distinguished from P. facialis by truncated gaster with Gt2-7 nearly concealed by Gt 1 in both females and males ( Figs 30 a–c). Males of P. polychrosis has F3 transverse ( Fig.

30c) and males of P. facialis has F3 longer than broad ( Fig. 12 f). As discussed under P. mitsukurii , additional evidence is necessary to discuss their relationships further. See the key (couplet 24) and also remarks under P. mitsukurii .

Figures

FIGURE 12. Pediobius facialis (Giraud 1863). a: female, body in dorsal view; b: female, body in lateral view; c: male, body in dorsal view; d: female, hind leg; e: female, antenna; f: male, antenna; g: female, fore wing. Scale bar: a – c, 0.5 mm; d – f, 0.2 mm; g, 0.4 mm.

FIGURE 29. Pediobius mitsukurii (Ashmead, 1904). a: female, body in dorsal view; b: male, body in dorsal view; c: male, body in lateral view; d: female, antenna; e: female, fore wing; f: female, fore leg; g: female, mid leg; h: female, hind leg. Scale bar: a – c, 0.5 mm; d, 0.1 mm; e, 0.4 mm; f – h, 0.2 mm.

FIGURE 30. Pediobius polychrosis Sheng & Wang, 1994. a – b: female, body in dorsal view; c: male, body in dorsal view; d: female, fore wing. Scale bar: 0.5 mm.